PT Journal
AU Ledwig, T
   Nieves, J
   Pich, A
   Ruiz Arriola, E
   Ruiz de Elvira, J
TI Large-N-c naturalness in coupled-channel meson-meson scattering
SO Physical Review D
JI Phys. Rev. D
PY 2014
BP 114020
EP 17pp
VL 90
IS 11
DI 10.1103/PhysRevD.90.114020
LA English
AB The analysis of hadronic interactions with effective field theory techniques is complicated by the appearance of a large number of low-energy constants, which are usually fitted to data. On the other hand, the large-N-c limit helps to impose natural short-distance constraints on these low-energy constants, providing a parameter reduction. A Bayesian interpretation of the expected 1/N-c accuracy allows for an easy and efficient implementation of these constraints, using an augmented chi(2). We apply this approach to the analysis of meson-meson scattering, in conjunction with chiral perturbation theory to one loop and coupled-channel unitarity, and show that it helps to largely reduce the many existing ambiguities and simultaneously provide an acceptable description of the available phase shifts.
ER